Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur, 713209, India.
Department of Chemistry, National Institute of Technology Durgapur, Durgapur, 713209, India.
J Environ Manage. 2018 Jul 15;218:234-244. doi: 10.1016/j.jenvman.2018.04.031. Epub 2018 Apr 20.
A cyanobacterial strain, Synechococcus sp. NIT18, has been applied to sequester CO using sodium carbonate as inorganic carbon source due to its efficiency of CO bioconversion and high biomass production. The biomass obtained is used for the extraction of biomolecules - protein, carbohydrate and lipid. The main objective of the study is to maximize the biomass and biomolecules production with CO sequestration using cyanobacterial strain cultivated under different concentrations of CO (5-20%), pH (7-11) and inoculum size (5-12.5%) within a statistical framework. Maximum sequestration of CO and maximum productivities of protein, carbohydrate and lipid are 71.02%, 4.9 mg/L/day, 6.7 mg/L/day and 1.6 mg/L/day respectively, at initial CO concentration: 10%, pH: 9 and inoculum size: 12.5%. Since flue gas contains 10-15% CO and the present strain is able to sequester CO in this range, the strain could be considered as a useful tool for CO mitigation for greener world.
一种蓝藻菌株，即集胞藻 NIT18，已被应用于利用碳酸钠作为无机碳源来固定 CO，因为它具有高效的 CO 生物转化和高生物质产量。获得的生物质用于提取生物分子——蛋白质、碳水化合物和脂质。本研究的主要目的是在统计框架内，通过培养不同浓度的 CO（5-20%）、pH 值（7-11）和接种量（5-12.5%）的蓝藻菌株，实现 CO 的最大固定和生物质及生物分子的最大产量。在初始 CO 浓度为 10%、pH 值为 9 和接种量为 12.5%时，CO 的最大固定率和蛋白质、碳水化合物和脂质的最大生产率分别为 71.02%、4.9 mg/L/天、6.7 mg/L/天和 1.6 mg/L/天。由于烟道气中含有 10-15%的 CO，而目前的菌株能够在这个范围内固定 CO，因此该菌株可以被视为应对全球变暖的一种有用工具。
